Kevin,
I'm having much the same problems as this fellow. It started last week when I couldn't get into the generator, kept getting an error message. Then I accidentally let VS delete the menu item from the Tools menu.

I know that VS is reading the addin file because when I make a deliberate error in the file VS gives me an error message.

Please look at thread 1190529 for the full text of what's been done and recommended.

Thanks,

James